Margaretha Krook, Actress: Persona. Margaretha Krook was born on October 15, 1925 in Stockholm, Stockholms län, Sweden as Margaretha Knutsdotter Krook. She was an actress, known for Persona (1966), The Adventures of Picasso (1978) and Morrhår & ärtor (1986). She was married to Stig Hammar. She died on May 7, 2001 in Stockholm.